| Abstract: | Load spectra for railway bridges from measurement data – Part 1: systematic investigations into damage equivalent factor λ1 on single span girders. The rapid progress in the evolution of memory device leads to an increasing data‐gathering. This offers new opportunities to define fatigue loads for railway bridges by systematic evaluations. So far, the definition of load spectra based on predefined trains and traffic mix was the only approach, but now it can be done much more detailed but even more CPU‐intensive by using influence data over a long period of time. This article shows practical results of this new approach for building load spectra by using systematic calculations on single span girders together with short theoretical explanations. The used influence data provided by the Österreichischen Bundesbahnen result in significant differences comparing to standardized values. Part 1 of this article includes exclusively the damage equivalent factor λ1 while the second part includes the damage equivalent factors λ2 and λ3 as well as the threshold value λmax and a model with respect to traffic trends. |
